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Copy - GCSE Chemistry 11L1 > 1.2 Limestone > Flashcards

1.2 Limestone Flashcards

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1
Q

Is calcium carbonate a compound or mixture?

A

It is a compound

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2
Q

What does calcium carbonate break down into through thermal decomposition?

A

Calcium oxide and carbon dioxide

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3
Q

What is used to make cement?

A

Clay and powder limestone

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4
Q

What is used to make mortar?

A

Cement, sand and water

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5
Q

What happens to lime water when carbon dioxide is present?

A

It turns cloudy

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6
Q

Calcium oxide reacts with water to produce what?

A

Calcium hydroxide

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7
Q

Calcium carbonate breaks down when heated what is this called called?

A

Thermal decomposition

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8
Q

What colour is calcium oxide when hot?

A

Yellow

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9
Q

What colour is calcium oxide when cold?

A

White

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10
Q

How do you produce calcium oxide from calcium carbonate?

A

Heating it

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11
Q

What is the formula for calcium oxide plus water.

A

CaO+H2O->Ca(OH)2

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12
Q

What is a benefit of a lime stone quarry?

A

Local employment

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13
Q

Limestone is mostly made of what?

A

Calcium carbonate

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14
Q

An advantage of using concrete for building foundations.

A

It is strong when squashed.

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15
Q

Limestone is mostly made of what?

A

Calcium Carbonate

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16
Q

What is mixed with Limestone and Sodium carbonate to create glass?

A

Sand

17
Q

What type of rock is Limestone?

A

Sedimentary

18
Q

How does limewater convert into limestone?

A

Carbon dioxide is bubbled through it

19
Q

What compound dissolves in water to form lime water?

A

Calcium hydroxide

20
Q

Cement is powdered limestone and what?

A

Sand and water

21
Q

If carbon dioxide is present, what does the lime water do?

A

Goes cloudy ☁️☁️☁️

22
Q

What does limestone under go when heated?

A

Thermal Decomposition

23
Q

When limestone reacts with an acid what is produced?

A

Water, Carbon Dioxide & a salt

24
Q

What gas is added to limewater to make limestone?

A

Carbon Dioxide

25
Q

What is the chemical symbol for lime water?

A

Ca(OH) (Aq)

2

26
Q

What is an economic impact of quarrying for Limestone?

A

New jobs and more money

27
Q

Andy says “Acid rain doesn’t damage limestone”. Is andy correct or wrong

A

Andy is wrong

28
Q

Cement is used to make concrete, but what else is?

A

sand, water & powdered rock aggregate

29
Q

When Limestone is heated you get a new substance and a gas, write out the chemical symbols for both of these.

A

CaO + CO

2

30
Q

What is produced by putting limestone under thermal decomposition

A

Calcium oxide and carbon dioxide

31
Q

If limewater turn cloudy what is present?

A

Carbon dioxide

32
Q

What is needed in order to created cement?

A

Clay and limestone which is powdered

33
Q

Carbonates react with icid to produce what?

A

Carbon dioxide

34
Q

What is the chemical formula for calcium carbonate?

A

CaCO3

Copy - GCSE Chemistry 11L1 (23 decks)

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